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Also add a From implementation for &mut Option<T> -> `Option<&mut T>'

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Georg Semmler 2018-08-10 14:21:17 +02:00
parent 0cde1cbb10
commit a7a0225a28
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7
src/libcore/option.rs
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@ -1071,6 +1071,13 @@ impl<'a, T> From<&'a Option<T>> for Option<&'a T> {
}
}
#[stable(feature = "option_ref_from_ref_option", since = "1.30.0")]
impl<'a, T> From<&'a mut Option<T>> for Option<&'a mut T> {
fn from(o: &'a mut Option<T>) -> Option<&'a mut T> {
o.as_mut()
}
}
/////////////////////////////////////////////////////////////////////////////
// The Option Iterators
/////////////////////////////////////////////////////////////////////////////